249839972 has 12 divisors (see below), whose sum is σ = 437340540. Its totient is φ = 124885536.

The previous prime is 249839969. The next prime is 249839981. The reversal of 249839972 is 279938942.

It can be written as a sum of positive squares in 2 ways, for example, as 77862976 + 171976996 = 8824^2 + 13114^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14738 + ... + 26774.

It is an arithmetic number, because the mean of its divisors is an integer number (36445045).

Almost surely, 2^249839972 is an apocalyptic number.

It is an amenable number.

249839972 is a deficient number, since it is larger than the sum of its proper divisors (187500568).

249839972 is a wasteful number, since it uses less digits than its factorization.

249839972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17230 (or 17228 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 53.

The square root of 249839972 is about 15806.3269610621. The cubic root of 249839972 is about 629.8260811598.

The spelling of 249839972 in words is "two hundred forty-nine million, eight hundred thirty-nine thousand, nine hundred seventy-two".